Patents by Inventor Pascal Baldo

Pascal Baldo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for heat treatment under a gaseous atmosphere containing nitrogen and hydrocarbon
    Patent number: 4992113
    Abstract: Process for the heat treatment of low-alloy steels at temperatures higher than 600.degree. C., such as annealing or heating before hardening, etc., said treatment being carried out in a protection atmosphere produced by the injection of nitrogen, hydrocarbon C.sub.x H.sub.y and optionally hydrogen, with a control of the atmosphere. According to the invention, the composition of the residual species CH.sub.4, CO, H.sub.2 O, and the temperature of the gaseous mixture in the furnace are controlled in order to control the carburization and the decarburization of the treated steels.
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: February 12, 1991
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Pascal Baldo, Eric Duchateau